I have been working to rebuild a windows 8.1 computer. I had to buy the recovery disk since the person corrupted the recovery partition as well as forgot their password. Basically the computer is only a few weeks old, the operating system is the factory default. The person has a subscription to GrimeFighter. I tried to put on GrimeFighter however it came back and told me that the operating system was not compatible. I had the thought that maybe there was a problem with the computer. However I tested installing Grimefighter on 3 additional computers with 8.1, and I got the same message.
I wish Avast would admit this. My only answer was that it was my computer and not their software. This is why I attempted to install it on 3 other 8.1 computers. I like the Avast Antivirus and always recommend it to customers. The product doesn’t bog down the computer, plus it is free for a non-commercial person. I’ve used it for years with great success!